Question

Review the proof. Which step contains an error? step 2 step 4step 6step 8

Answer 1

Option C is correct.

Step 6 contains the error.

Step-by-step explanation

Looking through the steps, we can see easily that the mistake occurs at the 6th step, specifically when the process moves from step 5 to step 6

-1 + cos θ = -2 sin² (θ/2)

If one multiplies through by -1

1 - cos θ = 2 sin² (θ/2)

NOT 1 + cos θ = 2 sin² (θ/2)

Hope this Helps!!!